2024
- 10 teams
2023-24
- 2 teams
2023
- 13 teams
2022-23
- 2 teams
2022
- 8 teams
2021
- 6 teams
2020-21
- 2 teams
2020
- 8 teams
2019
- 8 teams
2018
- 6 teams
2017-18
- 3 teams
2017
- 6 teams
2016-17
- 4 teams
2016
- 10 teams
2015-16
- 3 teams
2015
- 9 teams
2014-15
- 4 teams
2014
- 7 teams
2013-14
- 3 teams
2013
- 15 teams
2012-13
- 4 teams
2012
- 12 teams
2011-12
- 4 teams
2011
- 13 teams
2010-11
- 2 teams
2010
- 8 teams
2009-10
- 2 teams
2009
- 10 teams
2008-09
- 2 teams
2008
- 11 teams
2007
- 4 teams
2005-06
- 3 teams
2005
- 3 teams
2004-05
- 2 teams
2004
- 7 teams
2003
- 12 teams
2002
- 10 teams
2001
- 14 teams
2000
- 18 teams
1999
- 18 teams
1998-99
- 2 teams
1998
- 20 teams
1997-98
- 4 teams
1997
- 25 teams
1996-97
- 4 teams
1996
- 11 teams
1995-96
- 5 teams
1995
- 6 teams
1994-95
- 4 teams
1994
- 7 teams
1993-94
- 4 teams
1993
- 7 teams
1992-93
- 1 team
1992
- 11 teams
1991
- 5 teams
1990
- 8 teams
1989
- 8 teams
1988
- 4 teams
1987
- 11 teams
1986
- 11 teams
1985
- 5 teams
1984
- 5 teams
1983
- 5 teams
1982
- 5 teams
1981
- 4 teams
1980
- 3 teams
1979
- 5 teams
1974
- 1 team
1971
- 1 team
